Four tales unfold in the Eternal City: While vacationing in Rome, architect John encounters a young man whose romantic woes remind him of a painful incident from his own youth; retired opera director Jerry discovers a mortician with an amazing voice, and he seizes the opportunity to rejuvenate his own flagging career; a young couple have separate romantic interludes; a spotlight shines on an ordinary man.
In Italy, a woman fears her sister has been kidnapped; Inspector Enzo Avolfi fears it's worse. They team up to rescue her from a sadistic killer known only as Yellow.
Policewoman Anna Mari is forced to play a dangerous game with the title serial killer. If she loses, she witnesses the maniac's tortured victims having their throats cut in explicit close-up detail via webcam. She teams up with British cop John Brennan to find out the identity of the murderer.
